JP2002162296A - Heater with temperature detection sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an exchange of a temperature detection sensor. SOLUTION: An insertion opening 34a inserting a temperature detection element 33 into a sensor pipe 34 is positioned at the side of a mouth part 11a, a lead member 35 is arranged in the sensor pipe 34, led out from the insertion opening 34a to the outside, the temperature detection element 33 is made forward to insert the lead member 35 from the insertion opening 34a to a position contacted on the inner face of the edge of the sensor pipe 34, can be taken out by drawing the lead member from the sensor pipe and is stored in the sensor pipe 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a mold temperature control,
It belongs to a heater with a temperature sensing sensor that has a temperature sensing sensor that senses the temperature of the heater body used for preventing excessive rise, controlling the temperature of the sealing machine, controlling the temperature of the inside of the liquid container and the liquid pipe, and preventing freezing.

[0002]

2. Description of the Related Art Conventional heaters with a temperature sensor are:
A temperature sensing sensor having a temperature sensing element provided in the heater body to sense the temperature of the heater body is provided.
The heater body includes a metal pipe serving as a lip portion having one end opened in the axial direction, an electrically insulating filler filled in the metal pipe, and a metal pipe separated from the inner surface of the metal pipe in the axial direction. And a heat generating wire held in the metal pipe via a filler in parallel to the heat generating wire, and conductive terminal members connected to both ends of the heat generating wire and led out of the metal pipe.

The temperature sensing sensor has a temperature sensing element and a lead member connected to the temperature sensing element inside the heater main body and led out from inside the heater main body.

[0004]

However, in a conventional heater with a temperature sensing sensor, a metal pipe is subjected to press working, swaging processing, etc. from the outside of the metal pipe to compress the packing and increase the packing density. Therefore, the temperature sensor is also firmly fixed through the filling in the metal pipe, so that if the temperature sensor fails, only the temperature sensor cannot be replaced.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a heater with a temperature sensing sensor which makes it easy to select and assemble or replace a temperature sensing sensor according to a customer request.

It is another object of the present invention to provide a heater with a temperature sensing sensor which can be used to mount a glass-sealed type temperature sensing element which could not be used for its strength.

[0007]

According to the present invention, a heater body includes a heater body and a temperature sensing sensor having a temperature sensing element provided in the heater body to sense a temperature of the heater body. A metal pipe having an opening at least one end in the axial direction; an electrically insulating filler filled in the metal pipe; and a shaft of the metal pipe separated from the inner surface of the metal pipe. A heating wire held in the metal pipe via the filler in parallel to a direction, and a conductive terminal member connected to both ends of the heating wire and led out of the metal pipe. A heater having a temperature sensing sensor, wherein the temperature sensing sensor has a lead member connected to the temperature sensing element inside the heater body and led out from the inside of the heater body.
It has a sensor pipe disposed in parallel with the axial direction in the metal pipe from the mouth portion, an insertion port for inserting the temperature sensing element into the sensor pipe is located on the mouth portion side. The lead member is disposed in the sensor pipe and is led out of the insertion opening, and the lead member is inserted from the insertion opening to a position where the lead member comes into contact with the inner surface of the distal end of the sensor pipe with the temperature sensing element as a leading end. A heater with a temperature sensing sensor is obtained, wherein the temperature sensing element is housed in the sensor pipe so as to be able to be taken out of the sensor pipe by pulling out the lead member from the sensor pipe.

[0008]

In the heater with the temperature sensing sensor of the present invention, a heater in which a sensor pipe is inserted and embedded is manufactured.
After completion, the temperature sensor is fixed in the sensor pipe.It is easy to select and install the temperature sensor according to the customer's request. A glass-sealed type temperature sensing element (such as a thermistor) that could not be used can be attached.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a heater with a temperature sensing sensor according to the present invention will be described below. FIG.
Shows a heater with a temperature sensing sensor according to the first embodiment. FIG. 2 shows the temperature sensor shown in FIG.

Referring to FIGS. 1 and 2, the heater with a temperature sensor has a heater body 11 and a temperature sensing element 33 provided on the heater body 11 to sense the temperature of the heater body 11. ing.

The heater body 11 has a metal pipe 12 having an opening 11a at least one end in the axial direction.
And magnesia oxide (Mg) filled in the metal pipe 12
o) a filler 13 filled with a powder such as aluminum oxide (Al ₂ O ₃ ) to be an electrical insulator; A heating wire 14 such as a nickel-chromium alloy wire held in a metal pipe 12 via
And a conductive terminal member 15 connected to both ends of the heating wire 14 and led out of the metal pipe 12.

Although there are two terminal members 15, FIG.
In (2), the other terminal member 15 is located behind one of the two terminal members 15. A cable 17 is connected to the terminal member 15. The connecting portion between the terminal member 15 and the cable 17 is connected by a conductive connecting member 18 and further covered by an electrically insulating insulating sleeve 19.

The first heater sealing member 21 for sealing the mouth portion 11a of the metal pipe 12 and the second heater sealing member 22 which is provided adjacent to the first heater sealing member 21 are provided. , First and second heater sealing members 21 and
Insulating first spacer member 2 facing the inner peripheral surface of metal pipe 12 at the back of mouth portion 11a facing
3, the second spacer member 24 and the axially long dimension provided in the axial direction between the first and second heater sealing members 21 and 22 and the first and second spacer members 23 and 24. And an electrically insulating insulator 25.

The first heater sealing member 21 is made of silicon RTV rubber, epoxy adhesive or glass material, and the second heater sealing member 22 is made of silicon RTV rubber, epoxy adhesive or Adopt glass materials. In the first and second heater sealing members 21 and 22 in this embodiment, the silicon RTV rubber material and the glass material are located to face each other in the radial direction with respect to the axial direction.

The two terminal members 15 pass through the first and second heater sealing members 21 and 22, the insulator 25, and the first and second spacer members 23 and 24, and are connected to the heating wire 14. , A sensor pipe 34 penetrates through the first and second heater sealing members 21 and 22 and is inserted into the insulator 25. The tip of the sensor pipe 34 is located on the first spacer member 23 side.

Further, the heater with the temperature sensor is
An insulating bobbin 27 in which the heating wire 14 is wound around the outer peripheral surface;
And a third spacer member 29 provided on the inner surface of a closed portion that closes the other end of the metal pipe 12.

The types of the temperature sensing element 33 include a thermocouple, a thermistor, particularly a glass-sealed thermistor,
There is a PT sensor and the like. The temperature sensing sensor 31 is connected to the temperature sensing element 31 in the heater main body 11 and is led out from the inside of the heater main body 11 to the outside. And a sensor pipe 34 disposed in parallel.

Further, the temperature sensing sensor 31 has an insertion port 34a for inserting the sensor pipe 34 into the mouth 11a.
Located on the side. The lead member 35 is disposed in the sensor pipe 34 and is led out of the insertion port 34a. In the sensor pipe 34, the lead member 35 is housed so as to be inserted from the insertion opening 34 a to a position where the lead member 35 comes into contact with the inner surface of the distal end of the sensor pipe 34, with the temperature sensing element 33 at the front. Further, the temperature sensing element 33 is housed in the sensor pipe 34 so that the lead member is pulled out from the sensor pipe 34 so that the temperature sensing element 33 can be taken out from the sensor pipe 34.

A fluid 37 is accommodated in the sensor pipe 34 in this embodiment.
The insertion port 34 a of the sensor pipe 34 is sealed by a sealing member 39 so as to seal the sensor. The fluid 37 is an electrically insulating powder such as a powder made of magnesium oxide or aluminum oxide. As the sealing member 39,
Silicon RTV rubber, epoxy-based adhesive, glass material, or the like is used.

FIG. 3 is a view of the insulator 25 as viewed from the left side of FIG. In the insulator 25, reference numerals 25a, 25b are terminal insertion holes into which the terminal members 15, 15 are inserted. Reference numeral 25c denotes a sensor insertion hole into which the sensor pipe 34 is inserted. FIG. 4 is a view of the bobbin 27 as viewed from the left side of FIG. In the bobbin 27, reference numerals 27a,
27b is a terminal insertion hole into which the terminal member 15 is inserted.

The heater with a temperature sensing sensor according to this embodiment is assembled as follows. First,
The heating wire 14 wound around the bobbin 27 is prepared, and the two terminal members 15 are inserted into the terminal insertion holes 27a and 27b of the bobbin 27. Next, first to third spacer members 23, 24 and 29 are provided at both ends of the bobbin 27 in the axial direction. That is, the terminal insertion holes 27a, 27b of the bobbin 27
Then, both ends of the heating wire 14 are connected to the respective terminal members 15. Then, the terminal insertion hole 2 of the insulator 25 is pressed so as to abut against the first spacer member 23.
The terminal member 15 is inserted into 5a, 25b. Thereafter, the sensor pipe 34 is inserted into the sensor insertion hole 25 c of the insulator 25, and is inserted into the metal pipe 12 from the mouth 11 a side of the metal pipe 12.

The first to third spacer members 2
3, 24, and 29 are not limited to the number of sheets in this embodiment. The first and second spacer members 23 and 24 have notched gaps in their outer peripheral portions so that the powdery filler 13 flowing from the mouth 11a side can be filled around and inside the bobbin 27. Are formed. Further, the sensor pipe 34 is a pipe including a diameter reduced by pressing or swaging.

Next, the insulator 13 is filled in the metal pipe 12, and after filling, the metal pipe 12 is rolled from outside the metal pipe 12 by press working or swaging. At this time, the entire metal pipe 12 is rolled. Further, the lip 11a
Is sealed by the first and / or second heater sealing members 21 and 22.

One of the first and second heater sealing members 21 and 22 in this embodiment is made of a glass material, and the other is sealed with silicon RTV rubber. Next, after inserting the temperature sensing element 33 into the sensor pipe 34, the powdery fluid 37 is put into the sensor pipe 34, and the insertion portion 34 is inserted by the sealing member 39.
a is sealed.

What is important here is that the fluid 37 is inserted into the sensor pipe 31 in a state of having fluidity. This is different from the filler 13 in which the heating wire 14 is filled and fixed in the heater pipe 12.

If the filler 13 is filled between the second heater sealing member 22 and the spacer member 23 in the metal pipe 12, the insulator 25 can maintain a stable position.

When a failure occurs in the temperature sensing element 33, the sealing member 34a is removed and the sensor pipe 3 is removed.
If the fluid 37 is poured out from 4, the temperature sensing element 33 can be taken out only by the operation of pulling out the lead member 35.

Further, a new temperature sensing element 33 that operates normally can be inserted into the sensor pipe 34, the fluid 37 can be inserted into the sensor pipe 34, and the insertion portion 34a can be sealed with the sealing member 39.

FIGS. 5 to 7 show a state where accessories are provided when a heater with a temperature sensing sensor is attached to a device. In the description of FIGS. 5 to 7, since the heater with the temperature sensing sensor is the same as that of the first embodiment, only the accessories will be described.

5 to 7, an outer peripheral surface of a mouth portion 11a of a heater with a temperature sensing sensor and a cable 17 are shown.
, Terminal member 15, and connecting member 18 connecting them
The exposed portion is insulated by a silicon-based insulating sleeve 19, and further provided with a cap 42 via a sealing material 41 such as silicon PTV rubber. This sealing material 41
With the cap 42, the heater with the temperature sensing sensor has a waterproof structure.

Further, there is a case where only the cap 42 is used without being sealed by the sealing material 41. In this case, a drip-proof structure is provided. A flange 43 for attaching a heater with a temperature sensing sensor to the device is provided on the outer peripheral surface of the metal pipe 12 behind the mouth 11a. A crimp terminal 51 is attached to the end of the cable 17. A lead terminal 53 is attached to the tip of the lead member 35.

In the heater with a temperature sensing sensor having such a configuration, the lead material is removed by removing the sealing material 41 and the cap 42, the sealing member 34a, and flowing the fluid 37 from the sensor pipe 34. It is possible to take out the temperature sensing element 33 only by pulling out the member 35.

FIGS. 8 and 9 show a second embodiment of a heater with a temperature sensing sensor. In the second embodiment, parts that perform the same functions as those of the components of the first embodiment will be described with the same reference numerals.

The heater with the temperature sensor shown in FIGS. 8 and 9 is composed of first and second electrically insulating heater sealing members 21 and 22 which seal the mouth 11a of the metal pipe 12.
And an electrically insulating first and second spacer member 2 facing the inner peripheral surface of the metal pipe 12 at the back of the mouth portion 11a facing the first and second heater sealing members 21 and 22.
And 3.

The terminal member 15 is connected to the heating wire 14 through the first and second heater sealing members 21 and 22, the insulator 25, and the first and second spacer members 23. The sensor pipe 34 includes the first and second heater sealing members 2.
It penetrates insulators 25 through 1 and 22. The tip of the sensor pipe 34 is located inside the bobbin 27.
The bobbin 27 has terminal insertion holes 27 a and 27 b for inserting the two terminal members 15 and a pipe insertion hole 27 c for inserting the sensor pipe 34.

The heater with a temperature sensing sensor according to this embodiment is assembled as follows. First,
A heating wire 14 wound around a bobbin 27 is prepared, and two terminal members 15 are inserted into terminal insertion holes 27a and 27b of the bobbin 27 shown in FIG. Next, the first to third spacer members 23 and 2 are provided on both ends of the bobbin 27 in the axial direction.
4 and 29 are provided. That is, the terminal insertion hole 27 of the bobbin 27
The terminal members 15 are inserted into the terminals a and 27b, and both ends of the heating wire 14 are connected to the terminal members 15, respectively.

Then, the sensor pipe 34 is connected to the bobbin 27
The metal pipe 12 is inserted into the metal pipe 12 from the mouth 11a side of the metal pipe 12. Also in this embodiment, the number of the first to third spacer members 23, 24, 29 is not limited, and the first and second spacer members 23, 24 are provided with a mouth portion. A notch-shaped gap is formed in the outer peripheral portion so that the powdery filler 13 flowing from the 11a side can be filled around and inside the bobbin 27.

Next, the insulator 13 is filled in the metal pipe 12, and after the filling, the metal pipe 12 is rolled by pressing or swaging from the outside. At this time, the entire metal pipe 12 is rolled. Further, the lip 11a
Is sealed by the first and / or second heater sealing members 21 and 22. 1st and 2nd in this embodiment
One of the heater sealing members 21 and 22 is made of a glass material, and the other is sealed with a silicone RTV rubber.

Next, after inserting the temperature sensing element 33 into the sensor pipe 34, the powdery fluid 37 is put into the sensor pipe 34, and the insertion portion 34a is sealed by the sealing member 39. Here, what is important is that the fluid 37 is inserted into the sensor pipe 31 with fluidity. This is different from the filler 13 in which the heating wire 14 is filled and fixed in the heater pipe 12.

If a failure occurs in the temperature sensing element 33, the sealing member 34a is removed, and the fluid 37 is poured out of the sensor pipe 34, so that the temperature sensing element 33 can be removed only by pulling out the lead member 35. It is possible.

Furthermore, a new temperature sensing element 33 that operates normally can be inserted into the sensor pipe 34, and the insertion portion 34a can be sealed with the sealing member 39.

In this embodiment, a cartridge type heater has been described.
Has a lip portion 11a, but in a heater such as a sheathed heater, the lip portions 11a are present at both ends of the metal pipe 12. It goes without saying that the present invention can be applied to such a sheathed heater.

[0043]

As described above, according to the embodiment of the present invention, according to the heater with a temperature sensing sensor of the present invention,
After the heater body incorporating the sensor pipe is pressed or swaged, the temperature sensing element is inserted into the sensor pipe, so that the thermistor, particularly the glass-sealed thermistor, does not crack due to the press or the saging.

Further, it is easy to manufacture the heater in advance as a standard product, and to select and assemble the temperature sensing sensor according to the request of the customer.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a heater with a temperature sensing sensor according to the present invention.

FIG. 2 is a cross-sectional view showing the heater with a temperature sensing sensor shown in FIG.

FIG. 3 is a front view showing the insulating member shown in FIG. 1;

FIG. 4 is a front view showing the bobbin shown in FIG. 1;

FIG. 5 is a side view showing an accessory part of the heater with the temperature sensing sensor shown in FIG. 1;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a sectional view of a main part of FIG.

FIG. 8 is a sectional view showing a second embodiment of the heater with a temperature sensing sensor according to the present invention.

FIG. 9 is a front view showing the bobbin shown in FIG. 9;

DESCRIPTION OF SYMBOLS 11 Heater body 11a Mouth 12 Metal pipe 13 Filler 14 Heating wire 15 Terminal member 17 Cable 18 Connecting member 21 First heater sealing member 22 Second heater sealing member 23 First spacer member 24 First 2 spacer member 25 insulator 25a, 25b, 27a, 27b terminal insertion hole 25c, 27c sensor pipe insertion hole 27 bobbin 31 temperature sensing sensor 33 temperature sensing element 34 sensor pipe 34a insertion opening 35 lead member 37 fluid 39 sealing member

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2F056 CE01 QC01 QC04 QC09 QC11 QC12 QC18 3K092 PP11 PP13 PP20 QA01 QB02 QB27 QC18 QC30 QC38 QC43 QC44 RA01 RA02 RB04 RB05 RB23 RC02 RC06 RC08 RC10 RC16 RURC UA18 VV03 VV31

Claims (6)

[Claims] 1. A heater body comprising: a heater body; and a temperature sensing sensor having a temperature sensing element provided in the heater body so as to sense a temperature of the heater body, wherein the heater body has an open end at least in an axial direction. A metal pipe serving as a mouth portion, an electrically insulating filler filled in the metal pipe, and the filler separated from the inner surface of the metal pipe and parallel to the axial direction of the metal pipe. A heating wire held in the metal pipe through the heating pipe, and a conductive terminal member connected to both ends of the heating wire and led out of the metal pipe. A lead member connected to the temperature sensing element and led out of the heater main body to the outside. A sensor pipe disposed in parallel with the sensor pipe, an insertion port for inserting the temperature sensing element into the sensor pipe is located on the mouth side, the lead member is disposed in the sensor pipe, and It is led out from the insertion port, and the temperature sensing element is provided at the front so that the lead member can be inserted from the insertion port to a position abutting on the inner surface of the tip of the sensor pipe, and by pulling out the lead member from the sensor pipe. A heater with a temperature sensing sensor, wherein the temperature sensing element is housed in the sensor pipe so as to be taken out of the sensor pipe. 2. The heater with a temperature sensing sensor according to claim 1, wherein an electrically insulating heater sealing member sealing the mouth portion of the metal pipe, and a back portion of the mouth portion facing the heater sealing member. A terminal member having an electrically insulating spacer member facing the inner peripheral surface of the metal pipe, and an electrically insulating insulator provided in the axial direction between the heater sealing member and the spacer member. Penetrates the heater sealing member, the insulator, the spacer member and is connected to the heating wire, and the sensor pipe is inserted through the heater sealing member and into the insulator,
A heater with a temperature sensing sensor, wherein a tip of the sensor pipe is located on a side of the spacer member. 3. A heater body comprising: a heater body; and a temperature sensing sensor having a temperature sensing element provided in the heater body so as to sense a temperature of the heater body, wherein the heater body has an open end at least in an axial direction. A metal pipe serving as a mouth portion, an electrically insulating filler filled in the metal pipe, and the filler separated from the inner surface of the metal pipe and parallel to the axial direction of the metal pipe. Heating wire held in the metal pipe, and conductive terminal members connected to both ends of the heating wire and led out of the metal pipe, and the temperature sensing sensor is located inside the heater main body. A heater having a temperature sensing sensor connected to the temperature sensing element and having a lead member led out from the inside of the heater main body, wherein the mouth portion is in the metal pipe in the axial direction. A sensor pipe disposed in parallel, an insertion port for inserting the temperature sensing sensor into the sensor pipe is located on the mouth side, and the lead member is disposed in the sensor pipe and the insertion is performed. The lead is drawn out of the mouth, and the temperature sensing element is provided at the front so that the lead member can be inserted from the insertion port to a position in contact with a tip inner surface of the sensor pipe and the lead member is pulled out from the sensor pipe. The temperature sensing element is housed in the sensor pipe so as to be taken out of the sensor pipe, and has an electrically insulating bobbin around which the heating wire is wound around an outer peripheral surface. A sensor mounting hole for positioning a sensor pipe is formed, and the terminal member is connected to the heater sealing member and the spacer. The sensor pipe penetrates through the member and is connected to the heating wire, and the sensor pipe is inserted through the heater sealing member and into the sensor mounting hole of the spacer member and the bobbin so that the sensor pipe is at a desired position of the bobbin. A heater with a temperature sensing sensor, wherein the tip of the heater is located. 4. The heater with a temperature sensing sensor according to claim 1, wherein a fluid is contained in the sensor pipe, and an insertion port of the sensor pipe is sealed by a sealing member so as to seal the fluid. A heater with a temperature sensing sensor that is sealed. 5. The heater with a temperature sensor according to claim 4, wherein the fluid is an electrically insulating powder. 6. The heater with a temperature sensing sensor according to claim 2, 3 or 4, wherein said heater sealing member, said sealing member is one or two selected from silicon RTV rubber, epoxy adhesive or glass material. A heater with a temperature sensing sensor, characterized in that: